libxml2 in Apple iOS before 9.2, OS X before 10.11.2, and tvOS before 9.1 allows remote attackers to obtain sensitive information or cause a denial of service (memory corruption) via a crafted XML document, a different vulnerability than CVE-2015-7115.
https://support.apple.com/HT205640
https://support.apple.com/HT205637
https://support.apple.com/HT205635
http://lists.apple.com/archives/security-announce/2015/Dec/msg00005.html
http://lists.apple.com/archives/security-announce/2015/Dec/msg00001.html
http://lists.apple.com/archives/security-announce/2015/Dec/msg00000.html